Post Utme Chemistry Past Questions and Answers

Question 716:

Which of the following statements is TRUE of the complete hydrolysis of a glyceride by sodium hydroxide?

A. 3 moles of \(\mathrm{NAOH}\) are required for each mole of glyceride
B. 3 moles of glycerol are produced
C. Only one mole of soap is formed
D. Concentrated \(\mathrm{H}_{2} \mathrm{SO}_{4}\) is essential for the completion of the reaction

Question 717:

A piece of radioactive element has initially \(8.0 \times 10^{22}\) atoms. Half-life is two days. After 16 days, the number of atom is ____________

A. \(5 \times 10^{21}\)
B. \(5 \times 10^{22}\)
C. \(2 \times 10^{22}\)
D. \(2 \times 10^{21}\)

Question 718:

Chlorine is a common bleaching agent. The is not true with ____________

A. Wet litmus paper
B. Printer's ink
C. Wet pawpaw leaf
D. Most wet fabric dyes

Question 719:

Calcium forms complexes with ammonia because ____________

A. It is a transition metal
B. It is an s-block element
C. It has empty \(\mathrm{d}\)-orbital
D. It forms colourless compounds

Question 720:

The IUPAC name for \(\mathrm{CICH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{OH}\) is ____________

A. 1-chloropopan-3-ol
B. 3-chloropropan-1-ol
C. 1-chloropropanol
D. 3-chloropropanol